{"version":"1.0","provider_name":"\u00c9tienne Ghys","provider_url":"https:\/\/perso.ens-lyon.fr\/ghys","author_name":"ghys","author_url":"https:\/\/perso.ens-lyon.fr\/ghys\/author\/ghys\/","title":"The index theorem, at the top - \u00c9tienne Ghys","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"6SYt3LaWhE\"><a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/2021\/03\/21\/the-index-theorem-at-the-top\/\">The index theorem, at the top<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/perso.ens-lyon.fr\/ghys\/2021\/03\/21\/the-index-theorem-at-the-top\/embed\/#?secret=6SYt3LaWhE\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0The index theorem, at the top\u00a0\u00bb &#8212; \u00c9tienne Ghys\" data-secret=\"6SYt3LaWhE\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","description":"American mathematician Isadore Singer died on February 11, at the age of 96. With his collaborator Michael Atiyah, who died in 2019, he had proved the index theorem, famous among mathematicians, which earned them the Abel Prize in 2004. The exceptional importance of this theorem is attested by the fact that it establishes an unsuspected &hellip; Continuer la lecture de &rarr;"}